Valve



1,688,035 F; l.; BRYANT VALVE Oct. 16, 1928.

`Filed Deo. 51, 1925 Patented Get. 16,1928.

FRANK n BRYANT, or Jet LLINOES.

VALVE.

Application filed December My invention relates to'valves, and more particularlyto valves for controlling' the tlow of vpulverulent material-and the iihe.

in handiingl dry'fmaterial such as ...io -ocalcium phosphate inpowder term, lnr that thek material tends to canse sticking` or the usual controlling,l valves by forming a somewhat'plastic or gummy 4deposit between the operatingsurfaces.l Thisist-rue not only `of the aforesaid materiah but also ot other materials particularly organic powders, pulverized coal, andthe' like.

1FV-here a rotatableplug valve is used, great difficulty hasbeen experienced lin .operatingl the same. I have found that this is due to two act-ors,namely,y the extensive area of contact betweenthe plug and the cage or housing, and theinability ot the surfaces th us in engagement. to clean themselves.

My invention provides a kvalve preferably in the form of a. suitable plughaving primarily va smali area ot Contact .between the Furthermore, I pr'ovideavalve seat parts.. which. is selt1 cleaning. lVhile l haveV made the seatself cleaning, it is within my ine vention to provide a cleaning `means independently of the s .e"at,'orV it is within my. in-

ven-tion tojreverse therelation of the parts, that. is, to makethe ,plug self` cleaning 1nstead of the-valve seat.

ivlhi'le my'invention is part-iciilarly ap-Y plicable tothe Vhandling of powdered materials, it is to be: understood that it is not to be limitedA to suoh, bnt the principles ot the invention may be applied V`Vgenerally, and

while have shown Vin the accompa ying drawings one particular embodiment in which my invention may appear, Ido not intend to be limited to this speci-tic fembodimentener to the .speciiic details herein diselosedelcept as they appear inthe appended claims. n Y

Now in order to acqua-int those skilled in the artv fith the construction and operation et my invention, IV shall describe a specific embodimentin connection with the accompanying drawings.

ln the drawings Fignre'l is a vertical cross section; and

2 is `asimilar cross section taken at reht angles to thefview of Fig. 1 on the line'v Seal N0. 78,505.

iangesf, 3, to co-operate with' the flanges of the cover plates 4, 5, which'cover plates'are piloted into the end ot the barrel or housing 1, as iiidicated at 6, 7. .Preferably these end plates et and 5 are made identical for ease of manntactnre. The barrel or housing mem ber 1 has an inlet passageway 8 defined lby a reativ ly Vshort neckv 9` terminating in -aclamping. flangev 10 for Jcennectingthe valve in the usual manner to flanged conductor pipes. rEhe inlet passageway 8 terminates n a poi-tf1?J deiined byV theinters'eetionof he inlet passageway 8 `and the interior ot the housing 1. The valve seat 13, which is et a special constructionhereinafter more fully described, is ormedat the junction ot 1he iniet passagewayand the interior ofthe vvalve and deiines` the port 12. This valve seat comprises a j ised surface having sharp inner and outer e'lges or corners. VThe interior ot' the Yhousing 1 is of such torinas to permit the valve seat 18 to stand outin relieiI for engagement with. the movable valve member 15. This valve member is preferably a section of a cylinder-ot suf- Y iicient peripheral length to contact withand cover completely'the valve seat 18 when the member 15 is'moved to a position 900 clockwise trein the position shown inV Fig. 2.

Thisvalve member 15 has at its end a pair of bre-.Chet members 16,'16 into lwhich are cnt the ways or gnides'l/ and 18.Y An operating shaft 2O extends tln'ongh the end plates f-l and '5 havingbearingl in the same, and this shaft has squared portions at 21, 22, tting the guides 17, 18. 5 rlhe shaft 2O has at itsforward end a suitable coupling` .portion 23 towhich a handle may be connected, this coupling portion terminating in a threaded stud 2411er h'oiding thehandie or operating' wheel upon the coupling Ypogtien 28. rllhe shaft 2O is coupled to the valveA member through the connections termed bythe ways 17' and 18 embrz'icing the squared portions 212ml 22. The valve member )ressed radially troni the shatt 2O by means t springs 25, 25, which lie inthegroove er slot 'formed between the ways 17,18, and

iress at one end against the squared portions 21, 22, and at their other ends against the bottom ot' the slot/or groove tmmed by the waysl 17 and` 18, pins 26, 26 beingA rthree ded into. the vmetal ot,v the valve member l5 and guiding' the ends ot the springs. vTheV pins 26 preY-.f'ent'lateral displacen-ient-otfone endet lim the springs out ofeach groove defined by the Ways 17 and 18. The portions 21, 22 need not be squared, they may be merely flattened by cutting away opposite sides so as to give parallel surfaces to iit between the guides 17, 18 and to permit the shaft to operate the plug member.

Since the seat 13 is set out in bas-relief from the inner cylindrical surface of the housing 1, the valve member which is pressed outwardly by the springs 25,25, wouldA unless other means were provided tend to drop off of the seat 13 and require lifting to get back onto the samel if the valve weremoved into the position shown in Fig. 2. In order to avoid this I have provided adj acent the seat 13 raised ribs 27 and 28 upony each side of the valve seat 13. These ribs are shown as extending peripherally in a straight line on the interior of the housing or barrel member 1, but may be made in any other referred manner, their essential function being to hold the valve member 15 clear of the inner surface of the barrel or housing 1, and in substantially the same radial position with respect tothe axis ofrotation as such valve member will occupy when in closed position.

yIn other words, the ribs or guides 27 and 28 f 1 ming thereof due to collection of material between the ribs and the valve, such as would occur if the ribs 27 were continuous,V is.

avoided. Y

The housing or barrel-member 1 has an outlet passageway 30` which isl formed by a curved tapered neck y31 having a bolting or clamping flange 32 for connecting the Valve in a run of'flanged pipesV or the like. A The neck' 31 is flared with a gentle curvature, as indicated at 33, to assist the flow of material .outwardly without tending to clog the outlet and to prevent the lodgment of loose niaterial in the lower part of the valve. It will be obvious to those skilled in the art that the y'outlet may be made Vlike thei'nl'et 'and may have/a valve seat such as 13 at the junction of the two portions. Y Y

Endwise motion of the valve member 15 is restrained by spacing collars 34, 34 on the shaft lying between the end plates tand 5 and the adjacent bracketsl, 16.

It is believed that the operation of the valve is apparent from vthe foregoing detail description. vWhen the valve is in the position shown in Figs. 1 and 2, the valve port 12 is opened as the valve member 15 lies to one side of the passageway extending from the inlet 8 through the valve rt 12, the body of the valve 1 and the out et 30. The valve body 15 is pushed out radially by the springs into engagement with the ribs or guides 27, 28, and without change of radial positiony this valve 15 may be rotated about the axis of the shaft 20 into position to seat upon the valve seat 13 and close the port 12. It will be observed that the area of contact between the ribs 27, 28 and the valve body 15 is very small, and hence even if there is a tendency fora gummy deposit to be formed,

lthe opposition to motion is greatly reduced l because of the small area incontact. As the valve passesover onto the seat 13 the sharp edges of the seatV 13 have an opportunity for scrapping and cleaning olf any coating or loose material on the cylindrical face of the valve 15.

While I have shown thev port 12 as being formed at the intersection of two substantially right cylinders and have shown the valve member 15 as being a portion of right cylinder', it is to be understood that the geometric form of these parts may be varied without departing from the invention. The cooperating seat 13 and valve member 15 should be complementary parts of a figure or solid generated by rotation.

Preferably the raised rim 13 and the ribs 27 and 28 are cast integral with the housing 1 and are machined off at one operation to a.

Vtrue cylindrical surface in the form shown.

port, a straight transverse rocking shaft in said barrel extending completely therethrough, a single valve member having `a curved cylindrical .bearing surface and a substantially fiat back, said member being con nectcd to the said shaft at the ends of the y barrel and out of line with the ports, said barrel having a raised rim about one of said ports, said rim being faced ofi' to vform a. I

valve seat to contact with said plug member to form' a tight joint, said valve being adapted to be moved wholly to one side of said inlet and outlet when open to provide a minimum obstruction for the passage of material through the barrel.

2. In a valve, a barrel member having an inlet port and an outlet port in alignment, a rocking shaft extending through said Valve, a single rocking valve member having a curved cylindrical surface, said valve memberbeing connected to the shaft, said barrel member'having on its inner surface a raised rim-about one of said ports to form a narrow valve seat for said valve member, and raised ribs lying Hush with the valve seat and sepguides forming continuations of the valveV seat spaced apart a distance less than the diameter of the valve seat, and a solid valve member co-operatingwith the valve seat and adapted to be held in line therewith by said guides.

1l. ln combinationI a valve housing comprising a substantially cylindrical barrel member, similariy constructed end plates for the barrel niemeer, straight rock shaft having bearings in said end plates, said shaft having parallel opposite n itches adjacent each end of the housing, said housing having an inlet port and an outlet port, valve member for closing one of said ports, said valve member comprising a segment of a cylinder having brackets, slots in said bracketsn said slots embracing said notched portions of the shaft and being guided endwise thereby, and springs between the `valvefmeinber and the shaft for pressing the valve member radially outward from the shaft.

5. In a valve, housing comprising a substantially cylindrical barrel having an inlet and an outlet passageway, caps for closing the ends of the barrel, a straight shaft having bearings insaid 'caps7 said shaft having two oppositely notched portions, a valve body in said barrel comprising an outer cylindrical surface co-operating with the inner Asuiface of the barrel member, said valve havingbracirets at its Aends with slots in the braeketsembracing thernotched portions of the shaft', being held against endwise movement thereby, and spring` means between the shaft and the valve. member vfor forcing the valve member' radially outward from thevshaft, and means for holding the valve endwise out of contact with the hous- G. A valve for controlling the flow of pulverulent material in a vertical conduit comprisii'ig a Vcylindrical barrel adapted to be disposedhorizontally, said' barrel having an inlet at its upper side and an outlet at its lower sine, the junction of the outlet and the interior of the barrel being. well rounded toprevent lodgment of the material handled, the, junction of the inlet and the barrel havingl an annular raised riin forming` a narrow valve seat, raised ribs flush with Vthe seat formed on the inner surface of the barrel, an axial shaft for the barrel, a valve comprising a segment of a cylinder supported on said ribs and adapted to slide from said ribs onto said seat, arms connecting the valve and the shaft, said arms permitting radial motion between the valve and the shaft, and spring means for pressing said valve outwardly radially. p

7. A valve for controlling the iow of pulverulent material in a vertical conduit comprising a. cylindrical barreladapted to be disposedY horizontally, said barrel having flanged ends, end plates of like construction secured to said flanged ends, said barrel having` an inlet at its upper side and an outlet at its lower side, thejunction "of the outlet and the interior of the barrel being flared to preventlodgment of the inaterialihandled, the junction ofthe inletand the barrel havan annular raised rim' forming a narrow valve seat, raised ribs flush with the seat formed on the inner surface of the barrel on each side of the seat. a straight axial shaft for the barrel having bearings in the end plates, said shaft having oppositely disposed parallel notches adjacent each of the end plates, a valve comprising a segment of a cylinder supported by said ribs and by said seat, said ,valvev having slotted brackets for embracing vthe notches in the shaft, said lgackets being out of the line of the inlet and outlet to present a minimum obstruction, and radially disposed springs guided in the notches in said brackets for pressing said valve out radially.

8. ln a valve structure, a barrelmeinber having an inlet port and an outlet port, said barrel having an inwardly projecting rim about one of the ports forming a valve seat, a valve rockably mountedin the barrel and having' a cylindrical surface for co-operation with said seat to close the port9 means for movingthe valve int-o and out of operative position, and raised ribs lyingy flush with the valve seat and separated by a space less than the diameter of the rim to provide guides forV holding the valve in the line with the seat.

9; ln a valve structure, a barrel member having an inlet port and Van out-let port, said barrel having an inwardly projecting rim about one of the ports forming a valve seat,

a valve rockably mounted in the barrel and having a cylindrical surface for cooperation with said seat to close the port, means for cil inc

iic

moving the valve into and dut of operative i position, l raised ribs lying flush with the valve seat' H.d spaced away from' the rim at points diainetricall opaosite thereof in the Y i l direction of the axis of movement of .said valve', the ribs providing guides for holding` the valve in linewith the seat.

ln witness whereof, l hereunto subscribe my naine this 28th day of December, 1925' i FRANK L. BRYANT. 

